Tuxumdonda urug'lanish jarayoni sodir bo'lganidan so'ng tuxum hujayra bachadon.,-■ nayiga o'tib, rivojlanishni davom ettiradi

(V20/21-106-27) A + G = T + C nimani ifodalaydi?

1. 
   purin asosiari soni primidin asoslari soniga teng ekanligini
   
2. 
   adenin son jihatdan sitozinga teng ekanligini
   
3. 
   adenin soni timinga guanin soni sitozinga teng ekanligini
   
4. 
   adenin va guanin yig'indisi sitozin va timinlar yig'indlsiga teng ekanligini
   

72. 
    (V20/21-108-9) DNK molekulasida 598 ta fosfodiefir bog'i bo'lsa, hamda G umumiy
    

nukleotidlar sonining 20%ini tashkil qilsa, A va T orasidagi vodorod bog'lar sonini toping.

1. 
   360 B) 240 C) 358 D) 480
   

73. 
    (v20/21-108-13) DNK zanjirida jami 6360
    

ta H mavjud. Agar zanjirda A va 6 nisbati 3:2 bo'lsa, shu zarijirdagi barcha nuklebtidlar sonini aniqlang, ‘

1. 
   10600ta B)6360ta
   

C)5300ta D)2650ta

73.